Beware the Ides of March! Julius Caesar was said to have been assassinated on this date in 44 B.C. by followers of Cassius and Brutus. In Shakespeare's play, Caesar, betrayed by his friend, dies with the words, "Et tu, Brute? Then fall Caesar!" The Ides falls on the 15th day of March, May, July and October; in the rest of the months, it is the 13th.